<template>
  <div>
    <!--面包屑-->
    <el-breadcrumb separator='/'>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区-->
      <el-row>
        <el-col>
          <el-button type='primary' @click='dialogAddRole = true'>添加角色</el-button>
        </el-col>
      </el-row>
      <!--角色列表区-->
      <el-table :data='rolelist' stripe border>
        <!--展开列-->
        <el-table-column type='expand'>
          <template slot-scope='scope'>
            <el-row :class='["bdbottom",i1 ===0 ? "bdtop" : "","vcenter"]' v-for='(item1,i1) in scope.row.children'
                    :key='item1.id'>
              <!--渲染一级权限-->
              <el-col :span='5'>
                <el-tag closable @close='removeRightById(scope.row,item1.id)'>{{ item1.authName }}</el-tag>
                <i class='el-icon-caret-right'></i>
              </el-col>
              <!--渲染二和三级权限-->
              <el-col :span='19'>
                <!--通过for循环嵌套渲染二级权限-->
                <el-row :class='[i2 === 0 ? "" : "bdtop","vcenter"]' v-for='(item2,i2) in item1.children'
                        :key='item2.id'>
                  <el-col :span='6'>
                    <el-tag type='success' @close='removeRightById(scope.row,item2.id)' closable>{{ item2.authName }}
                    </el-tag>
                    <i class='el-icon-caret-right'></i>
                  </el-col>
                  <el-col :span='18'>
                    <el-tag type='warning' @close='removeRightById(scope.row,item3.id)' closable
                            v-for='(item3,i3) in item2.children'
                            :key='item3.id'>
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>

          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type='index'></el-table-column>
        <el-table-column label='角色名称' prop='roleName'></el-table-column>
        <el-table-column label='角色描述' prop='roleDesc'></el-table-column>
        <el-table-column label='操作' width='300px'>
          <template slot-scope='scope'>
            <el-button size='mini' type='primary' icon='el-icon-edit'>编辑</el-button>
            <el-button size='mini' type='danger' icon='el-icon-delete' @click='deleteRole(scope.row.id)'>删除</el-button>
            <el-button size='mini' type='warning' icon='el-icon-setting' @click='showSetRightDialog(scope.row)'>分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!--添加角色-->
    <el-dialog
      title='添加角色'
      :visible.sync='dialogAddRole'
      width='50%'
    >
      <!--内容主体区域-->
      <el-form ref='addRoleRef' status-icon :rules='addFormRoles' :model='addForm' label-width='100px'>
        <el-form-item label='角色姓名' prop='roleName'>
          <el-input v-model='addForm.roleName'></el-input>
        </el-form-item>
        <el-form-item label='角色描述'>
          <el-input v-model='addForm.roleDesc'></el-input>
        </el-form-item>
      </el-form>
      <div slot='footer' class='dialog-footer'>
        <el-button @click='dialogAddRole = false'>取 消</el-button>
        <el-button type='primary' @click='addRole'>确 定</el-button>
      </div>
    </el-dialog>

    <!--分配权限-->
    <el-dialog
      title='分配权限'
      :visible.sync='setRightDialogVisible'
      width='50%'
      @close='setRightDialogClosed'
    >
      <!--树形控件-->
      <el-tree :data='rightslist' :props='treeProps' show-checkbox node-key='id' :default-expand-all='true'
               :default-checked-keys='defKeys'
               ref='treeRef'></el-tree>
      <span slot='footer' class='dialog-footer'>
    <el-button @click='setRightDialogVisible = false'>取 消</el-button>
    <el-button type='primary' @click='allotRights'>确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    // 所有角色列表数据
    return {
      rolelist: [],
      //  是否展开添加角色模块
      dialogAddRole: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addFormRoles: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          { min: 3, max: 20, message: '用户名的长度在3-20个长度之间', trigger: 'blur' }
        ]
      },
      //
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      // 默认选中的节点ID值
      defKeys: [],
      // 即将分配权限的id
      roleId:''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //  获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolelist = res.data
    },
    //  增加角色
    async addRole() {
      this.$refs.addRoleRef.validate(async valid => {
        if (!valid) {
          return
        } else {
          const { data: res } = await this.$http.post('roles', this.addForm)
          if (res.meta.status !== 201) {
            return this.$message.error('增加角色失败!')
          } else {
            this.$message.success('增加角色成功!')
            // 清除数据
            this.addForm.roleName = ''
            this.addForm.roleDesc = ''
            //  关闭dialog
            this.dialogAddRole = false
            //  刷新表单数据
            this.getRolesList()
          }
        }
      })
    },
    //  删除角色
    async deleteRole(id) {
      const confirmRes = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch((err => err))
      if (confirmRes !== 'confirm') {
        this.$message.info('取消删除!')
      } else {
        const { data: res } = await this.$http.delete('roles/' + id)
        console.log(res)
        if (res.meta.status !== 200) {
          this.$message.error('删除失败!')
        } else {
          this.$message.success('删除成功!')
          //  关闭这个弹窗
          this.dialogAddRole = false
          //  刷新数据
          this.getRolesList()
        }
      }
    },
    //  根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹窗提示用户是否要删除
      const confirmRes = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(res => res)
      if (confirmRes !== 'confirm') {
        this.$message.info('取消删除')
      } else {
        const { data: res } = await this.$http.delete('roles/' + role.id + '/rights/' + rightId)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        } else {
          // 刷新数据
          // this.getRolesList()
          role.children = res.data
        }
      }
    },
    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      this.setRightDialogVisible = true
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败！')
      } else {
        // 数据保存到data中
        this.rightslist = res.data
        console.log(this.rightslist)

        // 递归获取3级节点
        this.getLeafkeys(role, this.defKeys)
      }
    },
    // 通过递归的形式，获取角色下所有三级权限的id，放入数组中
    getLeafkeys(node, arr) {
      // 如果当前节点不包含children属性，则是3级属性
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafkeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        // ... 是展开运算符
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if (res.meta.status !== 200){
        return this.$message.error("分配权限失败！")
      }else{
        this.$message.success("分配权限成功！")
        // 刷新当前列表
        this.getRolesList()
        // 隐藏对话框
        this.setRightDialogVisible = false
      }
    }
  }
}
</script>

<style lang='less' scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>